Hi tulllio0106,
I have tested the MultilineTextBox component with the same version of jQuery and jQueryUI and still no success in reproducing the reported behavior from you.
If you share code example on how you generate the MultilineTextBox component from your smart element we will be able to find a solution for your use case.
Please, do not hesitate to contact us if you have any additional questions.
Best regards,
Yavor Dashev
Smart UI Team